The wiseguy father of “Mob Wives’’ star Renee Graziano faces up to three years in prison after pleading guilty yesterday to collecting an illegal debt.

Anthony “TG” Graziano, a 71-year-old consigliere of the Bonanno crime family, could have been hit with 20 years behind bars before he accepted a plea deal from Brooklyn federal prosecutors that is expected to slash his prison time.

He now faces 30 to 37 months in prison, said Patrick Parrotta, his attorney.

The mobster was ensnared late last year by Hector Pagan, a former Bonanno associate-turned-federal-informant, who is Renee Graziano’s ex-husband.